Re: [Hamlib-developer] Tentec Jupiter 538 Frequency

[Bob M. <RM...@be...>]

Nate:

Thanks for the response.   I did change the Poll from 1S to 2S and then 
3S with no observed change.   I did read something about WSJT V3.0.1 
having the issue but 3.0.2 seems to have resolved the issue.  This was a 
7300 as I recall.

I actually see the same occurrence on my K3S but the transition from 00 
to 55 and back to 00 is very fast.   Yes, I agree  the initialization on 
my K3S is not a problem.  This leads me to believe there needs to be a 
bit of delay entered into the initialization routine for the older and 
slower radios.

I've also tried a slower baud rate, from 57600 to 9600.  I've not found 
a way to set the radio to 9600.  Anyway, when I set the Port 1 for the 
radio to 9600, everything still works and I still see the 55 Hz 
frequency remain on the display.

At the moment I'm at a loss regarding the next steps.    FYI - this 
computer and WSJT 3.0.1 runs correctly with my Tentec Eagle and my 
Elecraft K3s.

Thanks  --  suggestions appreciated.

73

Bob, K4TAX


On 8/26/2026 5:54 PM, Nate Bargmann wrote:
> * On 2026 26 Aug 17:47 -0500, Bob McGraw wrote:
>> In initializing  WSJT configured for the Tentec 538, it appears the
>> application sends the frequency selected plus 55HZ.  It seems that the
>> application is confirming frequency control of VFO A. The application
>> appears to be running too fast for the old Jupiter and then thus leaves the
>> radio 55 HZ high in frequency as indicated on the display.    Is there some
>> way to add some delay or changing timing parameters such that the Tentec
>> Jupiter will resolve the frequency to the correct value?
> Hi Bob.
>
> Looking at WSJT-X Improved here, at the top right of the Radio tab in
> the Settings dialog I see a spin box titled Poll Interval.  Have you
> tried increasing that value?
>
>> In using the same application with my K3S, I observe the same brief
>> occurrence, but the K3S is responding faster to the application inquiry and
>> resolves to the correct frequency.  Not a problem.
> I use a K3 and just fired up WSJT-X after not doing so for several
> months mostly to check antennas for the upcoming KS QSO Party so it was
> easy to take a look.
>
>> Windows 10 Pro 64 bit, Tentec Jupiter 538, V1.29, RS-232 cable (no USB
>> conversion) between the radio and computer,  Port COM 1, 57600, 8 bit, No
>> Parity, stop 1 Flow Hardware.  Driver Microsoft 10.0.19041.1
> Though I'm running Debian 13 here, the Radio dialog should be the same.
>
> 73, Nate
>
>